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Energy Dissipation in the Mechanical-Diode Jump of a Nanoscale Contact

Published online by Cambridge University Press:  01 February 2011

Juan J. Martínez  and
M. Teresa Cuberes
Juan J. Martínez
Affiliation:
juanjillo_a@yahoo.com, University of Castilla-La Mancha, Laboratory of Nanotechnology, Plaza Manuel de Meca, 1, Almadén, E-13400, Spain
M. Teresa Cuberes
Affiliation:
teresa.cuberes@uclm.es, University of Castilla-La Mancha, Laboratory of Nanotechnology, Plaza Manuel de Meca 1, Almadén,, E-13400, Spain, 34902204100 ext. 6045
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Abstract

In Ultrasonic Force Microscopy, the mechanical diode response refers to the quasistatic cantilever deflexion in the presence of surface out-of-plane ultrasonic vibration of sufficiently high amplitude. The effect has been described by introducing ultrasonic-amplitude-dependent tip-sample force-distance curves [Phys. Rev. 61 (2000) 13997]. Here, we demonstrate that the ultrasonic hysteresis phenomenon is qualitatively explained taking into account that for certain ultrasonic amplitudes, the modified tip-sample forces lead to two stable quasi-static equilibrium states, separated by an energy barrier. Experimental UFM data obtained on mica at ambient conditions are discussed in terms of ultrasonic-induced quasi-static equilibrium states, taking into account the role of the surface water layer.

Keywords

scanning probe microscopy (SPM)adhesiontribology
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1085: Symposium T – Nanoscale Tribology–Impact for Materials and Devices , 2008 , 1085-T05-14
Copyright
Copyright © Materials Research Society 2008

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References

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